Finding the Fourth Proportional to 9,363.50, 12,921.69 and 5,171.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,363.50 : 12,921.69 = 5,171.75 : x
2. Step 2: Convert to fraction form
   9,363.50/12,921.69 = 5,171.75/x
3. Step 3: Cross multiply
   9,363.50x = 12,921.69 × 5,171.75
4. Step 4: Simplify right side
   9,363.50x = 66,827,685.65
5. Step 5: Solve for x
   x = 66,827,685.65/9,363.50
6. Step 6: Final answer
   x = 7,137.05